Canister



FIG. 1 is a front elevational view of a canister showing my new design;

FIG. 2 is an elevational view looking from the left of FIG. 1;

FIG. 3 is an elevational view looking from the right of FIG. 1;

FIG. 4 is a rear elevational view; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a canister, substantially as shown. 